Disasters > All Disasters > UNP-0066

The Dog's Sense of Smell
Julio E. Correa
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Pages / Length: 4
Publication Date: 06/10/2011

Olfaction, the act or process of smelling, is a dog’s primary special sense. A dog’s sense of smell is said to be a thousand times more sensitive than that of humans. In fact, a dog has more than 220 million olfactory receptors in its nose, while humans have only 5 million. Because of this keen sense of smell, dogs are able to locate everything from forensic cadaver material to disaster survivors as demonstrated during the terrorist attack on the World Trade Center on September 11, 2001.